Lift and ramp can be interchanged giving 2 solutions

That's the red herring

Lift and ramp being fully interchangeable isn’t really a red herring
Logic can’t be used to determine which goes in which group and both the solution and connections are correct

Creating commutative connections is quite clever - bit doesn’t work in the framework of the site’s systems

The same applies when a word is used twice - the system isn’t good enough to handle it so it’s best avoided

Signs of brands wasn’t correct but synonyms for brand is. I don’t consider these are synonyms so perhaps the allowable answers need expanding. Similarly the stairs group are ways of going up or down more than ways of moving through a building.